*{
    margin: 0;padding: 0;
}
.banner{
    width: 992px;
    height: 460px;
    position: relative;
}
.content img{
    position: absolute;
    width: 992px;
    height: 460px;
}
.content img:nth-of-type(1){
    z-index: 100;
}
button{
    cursor: pointer;
    background: url("../images/icon-slides.png");
    border: none;
    position: absolute;
    width: 41px;
    height: 69px;
    z-index: 200;
    outline: none;
}
.prev{
    background-position-x: -83px;;
}
 .next{
    right: 0;
    background-position-x: -126px;
}
.position-center-y{
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}
.prev:hover{
    background-position-x: 0;
}
.next:hover{
    background-position-x: -42px;
}
 .all-icons{
    z-index: 300;
    position: absolute;
    width: 100px;
    height: 18px;
    right: 35px;
    bottom: 25px;
}
.all-icons span{
    cursor: pointer;
    margin-right: 5px;
    display: inline-block;
    background: #333;
    border-radius: 50%;
    border: 2px solid #fff;
    width: 6px;
    height: 6px;
}
.all-icons .active{
    background: #F5FBFE;
    border:2px solid #333;
}